Study on the stability of hydro-liquefaction residue of Shenfu sub-bituminous coal
Study on the stability of hydro-liquefaction residue of Shenfu sub-bituminous coal
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神府次烟煤加氢液化残渣稳定性研究
DOI：
10.1016/j.fuel.2016.05.042
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发表时间：
2016-10
期刊：
影响因子：
7.4
通讯作者：
Shui, Hengfu
中科院分区：
文献类型：
--
作者：
Kang, Shigang;Lei, Zhiping;Ren, Shibiao;Shui, Hengfu
煤直接液化残渣的稳定性对煤直接液化工艺及残渣的利用具有重要影响。采用热重分析法（TGA）研究了6 t/d神华BDU工艺产生的二甘醇及其四氢呋喃可溶物（THFS）和不可溶物（THFI）的热解行为。通过热处理和加氢处理研究了其热稳定性和THFS加氢活性。结果表明，二甘醇及其组分具有不同的热解行为。无机组分对有机基质的热解有催化作用，而THFS对碳酸盐的热解有抑制作用。THFI的失重主要是由于碳酸盐的分解和脱氢作用，而不是有机基质的裂解。二氢萘的热稳定性主要取决于溶剂的供氢能力和溶解能力，热处理过程中形成的THFI主要来源于含氧官能团之间的缩合反应。废催化剂在低温下更容易生成THFI，但在低温下，废催化剂对THFS的缩合有抑制作用。
The stability of direct coal liquefaction residue (DCLR) has significant effects on the DCL technology and the utilization of DCLR. In this paper, the pyrolysis behaviors of the DCLR from 6 t/d Shenhua BDU technology and its components including tetrahydrofuran soluble (THFS) and insoluble (THFI) were investigated by thermogravimetric analysis (TGA). Then, its thermal stability and THFS hydrogenation activity were studied by thermal treatment and hydrogenation treatment, respectively. Results show that DCLR and its components have different pyrolysis behaviors. Inorganic components existed in DCLR and THFI show a catalytic effect on the pyrolysis of organic matrix, but THFS inhibits the decomposition of carbonates in DCLR. The weight loss of THFI mainly results from the decomposition of carbonates and the dehydrogenation rather than the cracking of organic matrix. The thermal stability of DCLR mainly depends on the hydrogen donating ability and the solvency of solvent, and THFI formed in the thermal treatment mainly originates from the condensation between oxygen containing functional groups. The spent catalyst in DCLR can inhibit the condensation of THFS, which is more prone to form THFI at lower temperature.
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